JPH0417418Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a double-acting trolley conveyor.

Conventional technology In the past, on an automobile production line, the automobile body was transported on a carrier hanger, and during this time various parts were attached or welded with screws, bolts, and nuts to assemble the automobile one by one. In order to improve productivity, efforts have recently been made to make robots unmanned and to speed up carrier transport. However, in welding processes using robots, for example, high precision is required to stop the conveyed vehicle body, so the carrier cannot be conveyed very quickly, and conversely, in short lines where only conveyance is performed between different processes, It is desirable to fast-forward the carrier;
Ultimately, in an automobile manufacturing line, it is necessary to select a carrier drive means so that a suitable carrier conveyance speed can be set according to the type and purpose of each process. In addition, especially in curved sections of the assembly line, the pusher on the power trolley side
Because the engagement angle between the dog and the carrier side engagement member deviates in accordance with the bending angle of the line, the traction force from the power trolley with electric wheels is not sufficiently transmitted to the carrier, and the driving force cannot be used effectively. There was a problem.

Purpose of the invention The purpose of this invention is to solve the problems of the prior art described above, and to transport objects at a transport speed suitable for each different process on an automobile manufacturing line, depending on the type and purpose of each process. can,
Moreover, the traction force by the power trolley is sufficiently transmitted to the carrier at the curved portion of the conveyor line, making it possible to effectively utilize the driving force and reliably convey objects such as car bodies.
We are trying to provide a double-acting trolley conveyor.

Structure of the invention In order to achieve the above-mentioned purpose, this invention has a towed horizontal roller attached to one side of a hanger suspended from a carrier that moves along the free rail, and A power trolley that moves along a first power rail arranged in parallel to a portion is provided with a horizontal roller clamping device having clamping members that can be opened and closed to clamp the horizontal roller from both sides, and The other side of the hanger is provided with an engaging protrusion for towing, and a drive chain or a second power rail that moves along a second power rail that is arranged in parallel with the other part of the free rail. - The gist is a double-acting trolley conveyor in which the trolley is provided with a dog that engages with this engaging protrusion.

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In this specification, "front" refers to the conveying direction of the carrier, "rear" refers to the opposite direction, and "left and right" refers to the forward direction.

1 to 4, 1 is a free rail, 2 is a carrier that moves along the free rail 1, and this includes a pair of front free trolleys 3a connected by a connecting member 14, and one Rear free trolley 3b and these free trolleys 3
a, 3b, and a hanger 4 rotatably attached in a horizontal plane, respectively.

The hanger 4 has a substantially gate shape when viewed from the front, and the vehicle body W of the automobile is placed on mounting portions 5 provided at the lower ends of the left and right arm portions of the hanger 4 in an inwardly projecting manner. 6 is the upper frame of hanger 4,
This is composed of a pair of horizontal horizontal members 7, front and rear, extending in a direction perpendicular to the free rail 1, and a pair of left and right vertical members 8, which connect the two and extend in the length direction of the free rail 1. There is. Reference numeral 9 denotes a bearing bracket which is provided in an upwardly projecting manner on the left side of the center of the front cross member 7 of the hanger upper frame 6, and has an opening 10 formed therein. Reference numeral 11 denotes a horizontal roller to be towed, which is housed in an opening 10 of the bearing bracket 9 so as to protrude from both the front and rear sides, and is rotatably attached to the bearing bracket 9 by a vertical shaft 12. Reference numeral 13 denotes a plate-shaped engagement protrusion for towing that is provided in a right-centered portion of the front cross member 7 of the upper frame 6 in an upwardly projecting manner.

Reference numeral 15 denotes a first power rail that is arranged parallel to the left side of the free rail 1 in, for example, an automobile parts assembly line where the conveyance speed is relatively slow and the distance is long. The traveling trolley 16 is guided. Self-propelled trolley 1
6 is a main trolley 18 in the center to which electric wheels 17 are attached, and connecting rods 2 on both sides of this
A pair of auxiliary trolleys 19 are connected to each other via a wire. 21 is a drive mechanism installed on the main trolley 18 in a leftward protruding shape and coaxially with the electric wheels 17, which includes a general-purpose motor, a speed reducer,
Includes brakes. Since the configuration of the self-propelled trolley 16 is already well known (for example,
-40379), detailed explanation thereof will be omitted.

Reference numeral 22 denotes a horizontal roller clamping device attached to the right side frame 23 of the main trolley 18 so as to extend from the right side.
It is equipped with

In the horizontal roller clamping device 22, 26 is a mounting member fixed to the front outer surface of the right side frame 23, and this includes a horizontal upper wall portion 27 and mutually parallel left and right side walls extending downward from this. 28,2
It consists of 9. A pair of front and rear clamping members 2
4 and 25 are attached to the lower ends of both side walls 28 and 29 by pivots 30a and 30b, respectively, in the middle of these side walls 28 and 29 so as to face each other and protrude downward, and each clamping member 24, 25
Rectangular clamping plates 24a, 2 are provided at the opposite edge of the tip.
A covering material 31 made of synthetic rubber or the like is lined on the opposing surfaces of these holding plates 24a and 25a. Reference numeral 32 denotes an upper link that is swingably attached to the front side of the upper ends of the left and right side walls 28 and 29 with a pin 36, and is provided with a protrusion 32a that projects forward. 3
Reference numeral 3 designates a lower link connected to the lower end of the upper link 32 by a pin 37, which has a substantially H shape when viewed from the front, and the lower end of this lower link 33 is connected to the upper end of the front holding member 24 in a forward projecting shape. It is connected by a pin 38 to an overhanging portion 24b provided in the. 34 is an air cylinder horizontally attached to the rear outer surface of the right frame 23 with a bracket 40;
This piston rod 35 is made to protrude forward, and its tip 35a is connected to the upper link 3.
It is connected to the convex portion 32a of No. 2 by a pin 39. 4
Reference numeral 1 designates a pair of spur gears that are fixed to the pivots 30a and 30b of the clamping members 24 and 25, respectively, and mesh with each other.These spur gears control the rotation of the front pivot 30a when one front clamping member 24 swings. This is to cause the other rear side clamping member 25 to swing, thereby opening and closing both clamping members 24 and 25 with respect to each other.

The above-mentioned double-acting trolley conveyor is applied, for example, to an automobile parts assembly line where the conveyance speed is relatively slow and the distance is long.
When the carrier 2 with the hanger 4 is towed by the self-propelled trolley 16 having electric wheels 17 that moves along the rail 15, the self-propelled trolley 16 is moved as shown by solid lines in FIGS. 16 main trolley 1
The piston of the air cylinder 34 provided at
It is sufficient if the rod 35 is made to protrude forward. As a result, the upper link 32 and the lower link 33 are vertically aligned in a straight line, and the front clamping member 24 coupled to the lower link 33 and the rear clamping member 25 interlocking therewith allow the hanger 4 to be towed. The horizontal roller 11 is held between the front and rear sides, and in this state, the electric wheels 17 are driven to rotate and the self-propelled trolley 16 moves forward, so that the carrier is 2 and the hanger 4 are towed, and the vehicle body W placed on the hanger 4 is transported.

In this case, although not shown, since both the free rail 1 and the first power rail 15 are bent in the horizontal plane at the curved portion of the conveyor line, both the front and rear clamps on the towed horizontal roller 11 Although the clamping angles of the members 24 and 25 will be slightly shifted in the horizontal plane, the horizontal roller 11
can rotate in a horizontal plane around the vertical axis 12, so both clamping members 24 and 25 can shift by a required angle with respect to the horizontal roller 11 while firmly clamping the horizontal roller 11 from both front and rear sides. As a result, the connection between the clamping members 24 and 25 and the horizontal roller 11 does not loosen at all, and the carrier 2 with the hanger 4 and the transported vehicle body W can be reliably transported by the driving force of the self-propelled trolley 16. It is possible.

In addition, in order to release the carrier 2 with the hanger 4 at the end point of the conveyor line equipped with the first power rail 15, as shown by the two-dot chain line in FIG. All that is required is to retract the piston rod 35 of the cylinder 34. As a result, the front and rear clamping members 24 and 25 open each other, and the horizontal roller 11 moves between these clamping members 2.
4 and 25, the carrier 2 is released.

FIG. 5 shows the carrier 2 with the hanger 4,
For example, it shows a state in which the object is conveyed on a conveyor line whose conveyance speed is relatively high and whose purpose is only to convey short distances. In the figure, a second power rail 42 is arranged parallel to the right side of the free rail 1, and a drive chain with rollers (not shown) runs on this power rail 42. A pair of front and rear tilting dogs 43, 44 are provided at predetermined intervals, each projecting downward. In the horizontal portion and the upward slope portion (not shown) of the conveyor line, as shown by the solid line in the same figure,
The towed engagement protrusion 13 provided on the hanger 4 of the carrier 2 is pushed and propelled by the tip of the rear tilting dog 44, and the carrier 2 with the hanger 4 and the towed vehicle body W placed on the hanger 4 are At the same time as the conveyor line is conveyed at a high speed, on a downwardly sloped portion (not shown) of the conveyor line, the speed of the carrier 2 with the hanger 4 exceeds the moving speed of the tilting dogs 44, 45 of the drive chain due to gravity, so that the tilting dogs 44, 45 of the drive chain are engaged. The protrusion 13 is now engaged with the tip of the front tilting dog 43, so that the carrier 2 with the hanger 4 and the transported vehicle body W are prevented from running out of control and are moved at the same speed as the tilting dogs 44, 45. It is something that is transported.

The other points in FIG. 5 are the same as those in FIG. 2, so the same parts in the drawings are given the same reference numerals.

In the above embodiment, the structure of the horizontal roller holding device 22 that holds the towed horizontal roller 11 of the hanger 4 from both sides is not limited to that shown in the drawings, and may have other structures. Further, in the embodiment, the horizontal roller clamping device 22
7 is shown attached to the power trolley 16, but it may of course be conveyed by other drive means. Further, the illustrated one has dogs 43 and 44 that engage with the towed engaging protrusion 13 to transport the carrier 2.
Although the dogs 43 and 44 are provided on the drive chain, the dogs 43 and 44 may be provided on other power trolleys (not shown) that move along the second power rail 42, for example.

Effects of the invention In the double-acting trolley conveyor according to this invention, a towed horizontal roller 11 is attached to one side of a hanger 4 suspended from a carrier 2 that moves along a free rail 1. A power trolley 16 that moves along a first power rail 15 arranged parallel to a part of the rail 1 is equipped with clamping members 24 and 25 that can be opened and closed to clamp the horizontal roller 11 from both sides. A horizontal roller clamping device 22 is provided, a towed engagement protrusion 13 is provided on the other side of the hanger 4, and a second power source is arranged in parallel with the other part of the free rail 1. - Since the drive chain or the second power trolley that moves along the rail 42 is provided with the dogs 43 and 44 that engage with the engagement protrusion 13, the process is different in, for example, an automobile manufacturing line. The object to be transported W can be transported at a transport speed suitable for each process depending on the type and purpose of each process. In this case, the clamping members 24, 2 provided on the power trolley 16
By clamping the horizontal roller 11 from both sides by the rollers 5, the power trolley 16 and the hanger 4 of the carrier 2 can be firmly connected, and the horizontal roller 11 can be clamped at the curved portion of the conveyor line. While being held from both sides by the members 24 and 25, the holding members 24 and 25 can be rotated by the required angle in a horizontal plane.
The coupling with the horizontal roller 11 does not loosen at all, the traction force by the power trolley 16 is sufficiently transmitted to the carrier, and the driving force by the electric wheels 17 etc. can be effectively used. This has the effect that the loaded vehicle body W can be reliably transported.

[Brief explanation of drawings]

The drawings show an embodiment of this invention, and FIG. 1 is a cross-sectional view of a double-acting trolley conveyor according to the invention, FIG. 2 is a partially cutaway side view taken along the line of FIG. 1, and FIG. 1 is an enlarged sectional view of the main part of FIG. 1, FIG. 4 is an enlarged side view of the main part along the line of FIG. 3, and FIG. FIG. 3 is a side view of the conveyor. 1...free rail, 2...carrier, 4...
... Hanger, 11 ... Horizontal roller for conveyance, 12
...Vertical shaft, 13...Towed engagement convex portion, 15...
...First power rail, 16...Self-propelled trolley,
17...Electric wheel, 18...Main trolley, 22...
Roller clamping device, 24, 25... clamping member, 32
...Top link, 33...Bottom link, 34...
Air cylinder, 42...Second power rail,
43, 44...Tilting Dotsugu.

Claims (1)

[Scope of utility model registration request] Carrier 2 moving along free rail 1
A towed horizontal roller 11 is attached to one side of the hanger 4, which is suspended from the free rail 1.
The power trolley 16 moving along the power rail 15 is provided with a horizontal roller clamping device 22 equipped with clamping members 24 and 25 that can be opened and closed to clamp the horizontal roller 11 from both sides.
On the other side, a towed engagement protrusion 13 is provided, and a driving chain or a second power rail moving along a second power rail 42 arranged in parallel with the other part of the free rail 1 is provided on the other side. 2 power trolley, there are dogs 43, 4 that engage with this engaging protrusion 13.
A double-acting trolley conveyor equipped with 4.